Seeing Zhao Tianming's expression, Vice President Yang and they are also ugly, if they are all fake, then the loss this time is a bit big. In particular, there is a more important treasure in it, which cost more than two million.

"How's it going?" Vice President Yang immediately asked.

Zhao Tianming shook his head: "Let me take a look first." ”

As he spoke, he picked up other objects, there were twelve in this batch, and I don't know what they came from.

Lu Tong comforted Vice President Yang: "Mr. Yang, there are a few things that I can be sure of, not fakes." ”

Vice President Yang was slightly relieved and said secretly: "That's good, that's good!" Even if you don't make money, as long as you don't give up your money too seriously, you can accept it, and you can buy a lesson.

However, Zhao Tianming is not so optimistic. I looked at several pieces in a row and was shocked.

He took out three of them, which were the three that Lu Tong couldn't see through. When Lu Tong saw it, he admired it even more in his heart, this young man was even stronger than he imagined.

After all, in such a short period of time, you can find out the problem object, and your eyesight is at least vicious enough.

He raised his thumb: "Awesome!

As soon as Vice President Yang saw it, he knew that there was definitely something wrong with these three things, and the two appraisers of the auction house thought so, which was basically a foregone conclusion.

Fortunately, it's only three pieces, and their auction house can afford this loss.

It seems that Brother Lu also sees the problems of these three things. Zhao Tianming said with a smile.

Lu Tong nodded: "These three bronzes, the means of counterfeiting are also clever, I thought it was a newly unearthed object at the beginning, but I didn't see that it was a fake." But later, the more you look at it, the more fake it becomes. ”

He has to admit that the current counterfeiting technology is becoming more and more sophisticated, and it is very difficult for him to identify. Just like this time, I slapped my eyes.

Bronzes are a very important part of the collection of cultural relics.

The ancient bronzes are majestic in shape and magnificent in ornamentation, and have accumulated profound cultural connotations in thousands of years, integrating extremely high cultural relics value and artistic value.

With the popularity of the collection market, the price of domestic bronzes has risen sharply in recent years, and bronzes that have been smuggled out of the country in the past are flowing back in a steady stream.

But on the other hand, because the production conditions and processes required for imitation are not complicated, antique bronzes have become a means for some criminals to obtain huge profits, such as transplantation, splicing and other imitation new processes are also emerging in an endless stream, so that collectors are unable to guard against it.

The sheer number of antique bronzes is also breathtaking, and you can see fake bronzes almost everywhere there are antiques, whether they are antique shops or small stalls.

Therefore, some people joke that if the fake bronzes that flood the antique markets and collectors are collected, it will be enough to make two bronze aircraft carriers.

Different from other types of cultural relics identification techniques, the identification of bronzes has adopted some identification methods that combine technology and tradition.

However, their auction house does not have that kind of scientific instrument for the time being, and a few days ago, Vice President Yang proposed to purchase appraisal instruments to reduce the risk of eye-catching.

"The main thing is that this batch of things is a bit much, which makes Brother Lu's eyes dazzled. Otherwise, it shouldn't be difficult to see through the flaws. Zhao Tianming said.

These words also saved face for Lu Tong.

Bronze ware is made by people smelting lead, tin, copper and other ore raw materials, reducing the aggregates formed by them to extract lead, tin and copper with high purity, and then casting them together in a certain proportion according to needs. In the complex environment that it undergoes after its formation, various metals are re-corroded into a substance similar to copper ore.

To identify bronzes, the most important thing is to look at patina.

Most of the patinas are various compounds of copper formed by complex chemical reactions between the metal components of copper, tin, lead and other elements in the surrounding environment that make up the bronze, and the color is mostly green and blue.

According to the information previously consulted by Zhao Tianming, the surface of the bronze ware that has survived for a short time and is relatively well preserved is less corroded, and generally has a coating layer such as "black lacquer ancient" or "mercury skin", which is also formed by the enrichment and precipitation of the constituent substances of the bronze ware after being oxidized, dissolved or eroded.

"These patinas, if you look closely, you will see that there is something wrong with them, they are not naturally formed. ”

Zhao Tianming continued: "In the process of formation, ancient rust will inevitably undergo various physical and chemical effects in a complex environment, such as pollution and weathering. ”

These relatively stable rusts are the product of thousands of years of interaction and compromise between bronze and the environment, showing a harmonious natural beauty and a symbol of its vicissitudes.

They not only reflect the composition of the raw materials of the bronze ware, but also record various information about the long years when the bronze objects "coexisted" with the environment.

From this level, we can judge the authenticity of bronze artifacts by the distribution, shape, color, luster and so on of rust.

Lu Tong nodded while listening, he also understood.

He understands that rusting imitations is a very critical process in the modern bronze antique process, and the similarity of rust and imitation directly determines whether the imitation is successful. Therefore, imitators have to use various methods to imitate antique rust.

Lu Tong even knows several methods of fraud, such as planting rust, glue rust, burning and melting rust, electroplating rust, transplanting rust, etc., which can be described as full of tricks, and those people are racking their brains for fraud.

The so-called "planting rust" is to mix various chemicals such as acid, alkali, salt and metal powder on the surface of the imitation, and then bury it in the soil to "plant" pseudo-rust.

Glue rust is to use glue, rosin, white slurry, varnish and other gelatinous materials to mix various ore powders and pigments, and apply them to copperware. Or remove the rust from other bronzes, mix it with varnish or glue and apply it to the antique bronzes.

These methods have their own advantages and disadvantages, as long as they are identified, it is not difficult to check their abnormalities and identify the authenticity.

Lu Tong's method of distinguishing ancient rust from new rust is actually very simple.

Prick the patina with the tip of a needle, the patina is very hard and difficult to pierce, and those pseudo-rusts made of glue are not only easy to pierce, but the needle will be caught by the pseudo-rust and cannot fall off after releasing the hand. This method is also effective for identifying repaired parts of bronze objects.

However, this time it did not work, resulting in the receipt of three fakes, which caused losses to the auction house.

"Is everything else alright?" asked Vice President Yang.

As long as everything else is normal, then it's easy to do, regardless of whether it has just been unearthed or not, and if you put it in your hands for a few years, who can tell that it has just been unearthed?

Zhao Tianming shook his head and said with a wry smile: "Other problems are even bigger, and if they are not handled well, the auction house will be in big trouble." ”